Transportation — Homi Bhabha Class 9 Biology MCQs with Solutions
Free Homi Bhabha Class 9 Biology Transportation MCQs with step-by-step solutions (13 questions). Part of Life Processes. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Transportation · medium · theory
The organ that pumps blood throughout the human body is the:
A. kidney
B. heart ✓ Correct
C. lung
D. liver
Solution: The heart is a muscular pump that circulates blood around the body.
Q2 — Transportation · hard · theory
Blood vessels that carry blood away from the heart are called:
A. arteries ✓ Correct
B. veins
C. nerves
D. capillaries only
Solution: Arteries carry blood away from the heart; veins bring it back.
Q3 — Transportation · medium · theory
The red pigment in blood that carries oxygen is:
A. melanin
B. haemoglobin ✓ Correct
C. insulin
D. chlorophyll
Solution: Haemoglobin in red blood cells binds and transports oxygen.
Q4 — Transportation · medium · theory
In plants, the tissue that transports food (prepared in the leaves) to other parts is:
A. xylem
B. cambium
C. phloem ✓ Correct
D. epidermis
Solution: Phloem transports food; xylem transports water and minerals.
Q5 — Transportation · hard · theory
The loss of water vapour from the leaves of a plant, which helps pull water upward, is called:
A. transpiration ✓ Correct
B. translocation
C. photosynthesis
D. respiration
Solution: Transpiration creates a suction (pull) that draws water up through the xylem.
Q6 — Transportation · hard · theory
Human beings have double circulation, which means the blood passes through the heart:
A. never
B. twice in one complete cycle ✓ Correct
C. once in one complete cycle
D. only through the lungs
Solution: Blood flows through the heart twice per cycle (pulmonary and systemic circulation).
Q7 — Transportation · medium · theory
Which component of blood is mainly responsible for clotting?
A. plasma only
B. platelets ✓ Correct
C. white blood cells
D. red blood cells
Solution: Platelets help the blood to clot and seal wounds.
Q8 — Transportation · hard · theory
The colourless fluid that flows in lymph vessels and helps in defence and transport is:
A. bile
B. plasma only
C. urine
D. lymph ✓ Correct
Solution: Lymph transports digested fats and helps fight infection.
Q9 — Transportation · easy · theory
In humans, the blood vessels that carry blood AWAY from the heart are called:
A. Venules
B. Capillaries
C. Arteries ✓ Correct
D. Veins
Solution: Arteries carry blood away from the heart and have thick, elastic walls to withstand high pressure. Veins carry blood back towards the heart.
Q10 — Transportation · medium · theory
The human heart has four chambers that keep oxygenated and deoxygenated blood separate. The main advantage of this separation is that it:
A. Reduces the number of blood cells needed
B. Slows down the heartbeat
C. Allows blood to flow backward
D. Ensures an efficient supply of oxygen to the body to meet high energy needs ✓ Correct
Solution: Keeping the two types of blood separate prevents mixing, so tissues receive fully oxygenated blood. This efficient oxygen supply supports the high energy needs of warm-blooded animals.
Q11 — Transportation · medium · theory
Which component of blood is mainly responsible for carrying oxygen to the body tissues?
A. Haemoglobin present in red blood cells ✓ Correct
B. Plasma
C. Platelets
D. White blood cells
Solution: Haemoglobin, the red pigment inside red blood cells, binds oxygen in the lungs and releases it to the tissues. White blood cells fight infection and platelets help clotting.
Q12 — Transportation · hard · numerical
The heart of a person beats about 72 times per minute and pumps about 70 mL of blood with each beat. Approximately how much blood does the heart pump in one minute?
A. About 50 litres
B. About 14 litres
C. About 0.5 litres
D. About 5 litres ✓ Correct
Solution: Blood pumped per minute = 72 x 70 mL = 5040 mL, which is about 5 litres. This is roughly equal to the total blood volume of an adult, so the whole blood supply circulates about once a minute at rest.
Q13 — Transportation · hard · theory
In a tall tree during the daytime, the major force that pulls water upward from the roots to the leaves through the xylem is:
A. Root pressure acting alone
B. Active pumping of water by the phloem
C. Transpiration pull created by evaporation of water from the leaves ✓ Correct
D. The force of gravity
Solution: As water evaporates from leaf cells (transpiration), it creates a suction, or transpiration pull, that draws a continuous column of water up the xylem. This is the main upward force in tall plants during the day.